.login_page {
    position: fixed;
    left: 0;
    right: 0;
    top: 0;
    bottom: 0;
    background-repeat: no-repeat;
    background-position: center;
    background-size: cover;
    background-image: url("http://static.yutao2012.com/92f365c0-3ef3-11e8-ba26-db895b35ee3b.png");
}

.login_layer {
    display: block;
    width: 460px;
    border-radius: 6px;
    background: rgba(255, 255, 255, .9);
    padding: 40px 25px;
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate3d(-50%, -50%, 0);

    .welcome {
        font-size: 16px;
        color: #333;
        text-align: center;
        margin-bottom: 10px;
    }

    .title {
        text-align: center;
        color: #333;
        font-size: 24px;
        font-weight: 400;
    }

    .form_contrl {
        display: block;
        height: 50px;
        width: 100%;
        border-radius: 25px;
        background: #fff;
        overflow: hidden;
        border: 1px solid #ececec;
        margin-bottom: 30px;

        input {
            display: block;
            width: 100%;
            height: 100%;
            padding: 0 18px;
            border: none;
            outline: none;
        }
    }

    .submit {
        width: 100%;
        height: 48px;
        border-radius: 24px;
        background: #1DA57A;
        font-size: 16px;
        color: #fff;
        cursor: pointer;
    }
}